Film magazine



H. Gf -TAsKER Nov. i7,v 1936.

FILM MAGAZINE Filed June 2v,v 1935y PIE. 1.

NvENroR. Tasker m n l l 1 LA 1 .In

ATTORN Y' Patented Nov. 17, 12936 UNlTED STATES VllwiTENT oFFlcE FILM MAGAZINE Homer G. Tasker, Douglaston, N. Y., assigner to United Research Corporation, Long Island City, N. Y., a corporation of Delaware Application June 27, 1935, Serial No. 28,666

7 Claims. (Cl. 242-71) This invention relates to motion picture film of a-sound recorder employing the preferred magazines, and particularly to the type used in form of film magazine. sound recording apparatus. It is essential, in Fig. 2 is a sectional view through the supply sound recorders, that the film pass the point of roll compartment of the film magazine and is sound impression at a constant and unvarying taken along line 2 2 of Fig. 1.

speed. Any change in speed, even the slightest Fig. 3 iS a Sectional vleW thrOllgh the take-11D amount, will cause distortion of the sound reproroll compartment 0f the film magazine and is duced. taken along the line 3-3 of Fig. 1.

It has been found that ,one of 'the causesof Referring now to Fig. l, the film magalilrle variation in speed of the film as it passes through generally indicated at I, is mounted on a conl0 the recorder is in the take-up compartment of ventional sound recorder 2. Film 3 is led from the nlm magazine. When the film is drawn on a supply roll 4, through a pair of rollers 5 and to the take-up roll it has a tendency to weave 6 COmDrlSing a light trap t0 Prevent entrance Of wideways, the various turns striking one or both light into the COmPaItment frOm belOW in case sides of the magazine, V)geen time the film the dool` of the recorder is accidentally opened i5 touches the side 0f the magazine it introduces while there is still raw film within the magazine. friction which causes an uneven pull of the film. From the TOlleiS5 and 6 the film iS drawn Onto This uneven pull of the film maybe transmitted 011e eide Of a SDIOCke 7, tllerlee Over a drive through the film itself to that portionv of it which SDIOCkel 8. Over a Pair 0f lOlleIS 9 and l0 and is passing the sound gate, or it may be transdown Past e Sound gate 'i Where a iight beam 0f 20 nlitted through the take-up driving mechanism Varying Width is Projected thereon by a Suitable to the nlm drive sprockets. Although attempts .light modulating apparatus generally indicated have been made to minimize this uneven friction at 2f From the Sound gate 'i the fiim travels between the film and the sides of the magazine, between a iiywheei miler i3 and a Spring pressed such as by forming raised radial anges on the roller i3" over Toners la and i5 and thence 25 Eidos or by providing Strips of corduroy or felt und-er the sprocket 8, over roller I6, past the rear against which the mm is guided, nono have boon slde of the sprocket 1 and through lrollers 6 and entirely Successful in eliminating m 6 comprising one side of the magazlne light trap one object of the invention is to prevent from where 1t ls drawn onto the take-up roll l1.

Changes in the speed of the fum as it passes the Suitable controls I8 and I9 associated with meters 30 sound gate of a sound recording apparatus. 2n andt 2' 'freu -pvided tg control the various Another object of the invention ls to eliminate apri?? u? W1 n e Tem er-d 2 h the load fluctuations caused by film weave on the e erung now t9 Flgs 1 sin t e supply rou takemp reel compartment 22 1s lined with strips 23, 24, 25 and 26 of felt or corduroy material. Bosses 21 35 A further object of the invention is to prevent friction between the moving film and stationary elements.

Considered in its broadest aspects, the inven- 4 tion consists of a take-up spindle mounted in anti-friction bearings and has a guide flange at- I tached to one end thereof. A second guide flange and 28 are provided on either side of the strips 23, 24, 25 and 26 to align and hold the strips in position. A magazine cover 21 is threadably mounted as at 28 (Fig. 2) to the front of the compartment 22 and also has a felt strip 2B 40 attached thereto. A hollow hub portion 30 is mounted within a central aperture 3| provided Simiiar t0 the mst is mounted' upon an aiiti' at the back of the compartment 22 and is sefriction bearing provided upon the film magacured thereto by screws 32 and 33. A pahof Zine eovei and is in `eXi9-i eiignmeiit With the ball-bearings 3.4 and 35 mounted within the hol- 45 talle-11D YSpilidle- Thus it Will be Seen that frielow hub 30 carry a rotatable axle 35 which has a tion between the edges of the lm and the sides hub 31 attached thereto as by a pin 33, A longi- ...of the magazine will be prevented thereby elimtudlnal groove 3s ls provided on the hub 31 and inatng any uneven pull 0f the lm in the take-11D is' adapted tovbe engaged by a projection 40 pro- 5o reel- This will permit the use of a lighter driving vided on a, nlm spool 4|. The spool u lsspllt at 50 motor. Y one or more places on its outer edge to secure Forfurther details of the invention reference the end of the nlm therein. may be had to the accompanying illustrations Referring now to Fig. 3, the take-up compartwherein: menti! has a hollow hub portion 44 secured to Fig. 1 is an elevation al view, partly in section, the central portion of the compartment 42 as-by 55 rivets 45 and carries a pair of ball bearings I6 and 41. The bearings 46 and 41 carry an axle 48 which has a V-shaped pulley 49 attached to its outer end, adapted to be driven by a transmission belt l50. The belt 5|] is driven by a motor pulley (not shown) and is sufliciently loose to permit slippage to allow the take-up roll I6 to go slower as its diameter increases.

The inner end of the shaft 48 is provided with a hub or sleeve 5I, which is secured thereto by a pin 52. 'I'he hub 5l has a flange 53 on vits rear end and has a disc 54 mounted thereto as by rivets 55 to form a guide iiange for the film.

A cover 56 is threadably mounted in the takeup compartment 42 as at 51 and has a small plate 58 attached in the center thereof by screws 59 and 60 to provide an increased bearing portion for the screw threaded portion 6I f a short bolt 62. An enlarged bearing portion 63 of the bolt 62 carries a ball bearing 6d, the outer race 65 of which has mounted thereon a flange 66 lsimilar in size to thedisc 5d. The hub 5I is counterbored as at 61 to receive the extending portion of the ball bearing 6d.

A film spool 68 is securely mounted to the hub 5| as by a key and slot arrangement 69 (Fig. 1) andoarries the take-up roll I1. 1f the film weaves as it is wound on spool 68, one edge will contact the moving disc 54 with obviously no deleterious effect. 'Ihe other edge will contact the disc 66 which will move with the film thereby eliminating friction to a negligible degree since the disc 66 ismounted on ball bearings. This type of take-up reel construction is particularly desirable in sound recording or reproducing apparatus where fluctuating loads are harmful, although it may be used with any film system since the substantial elimination of film friction is always desirable.y

What is claimed is: y v

. l. In a iilm take-up magazine, a rotatabl shaft, a spool attached to said shaft and adapted to receive film thereon, a'rotatable guide at one end of said spool, said guide extending beyond the diameter of said spool, and a second rotatable guide at the other end of said spool and adapted to be rotated'solely by contact with said film.

50.. bysaid shaft and adapted to rotate concentrically 2. A lm take-up reel comprising a rotatable shaft,a disc mounted near one end oi said shaft and adapted to rotate therewith, a spool driven therewith, and a second disc at the other end of said spool comparable in size to said first disc and adapted tolrotate independently of said rotatable shaft.

3. 'I'he combination of a iilrn magazine and take-up reel comprising a cylindrical casing, a rotatable shaft at the center oi said casing, .a lm spool, means for mounting said spool on said shaft, a disc positioned along one side of said casing and adapted to be driven by said shaft, a. cover for said casing, a shaft positioned at the center of said cover and a disc comparable in size to said first disc and mounted on said cover shaft,

contact is made with filmv wound on said spool. 4. In a system for eliminating uneven film pull 4said second disc being adapted to rotate when in a take-up film magazine, the combination of a film spool, a large diameter rotatable disc at one end of said spool concentrically disposed with respect to said spool, anda second disc comparable in size to said first disc at the other end of said spool and adapted to be. rotated only when contact is made with film wound on said spool.

5. Ina film supply and 'take-up system for a sound recorder, the combination of a film feed sprocket, said sprocket advancing said film from a supply reel and feeding said film to a take-up reel, a casing for said reels, said casing being divided into separate compartments for said reels, a plurality of strips of fiexible material positioned on the sides of said supply reel compartment, and

movable guide flanges on either sideof said takeup reel in said take-up reel compartment, at least one of said anges being movable. solely by contact therewith of film being wound on said takeup reel.

6. A fllm take-up reel construction comprising ashaft adapted to berotated, alm spool mounted on-said 'shaft for winding lxn thereon and unwinding film therefrom, and rotatable anges on the sides of said spool, at least one of said flanges being adapted to rotate with said shaft solely upon fllm contact-therewith.

7. vA lm take-up magazine construction comy prising a cylindrical casing, a rotatable shaft' mounted on said casing, a lm spool mounted on said shaft, a ange at one end of sai d spool also mounted on said shaft, a cover for said casing, and a rotatable flange mounted on said cover.

HOMER, G. TASKER. j 

